Problemes d'ordi lent.. et internet lent ...

Bonjour,

MOn probleme est le suivant :

- mon ordinateur depuis 1 semaine est souvent au rallentis, et mon débit internet est considérablement lent ( je suis en WI-FI .. et n'as jamais été lent comme ca ! ).

MA machine : P4 - 2.4 ghz, 1 gig memoire, intel.

Win XP Pro, Service pack 3 ( pack 3, proviens d'un laser qu'un ami a Downloader d'internet ... )
Avast 4.8 pro - a jour
firewall : Look'n'stop 2.06

J'aimerais savoir si mon ordinateur est sains ( sans virus, spywire, trojan, ect.. )

voici mon log HiJackthis ( Trend Micro HijackThis v2.0.2 )

Logfile of Trend Micro HijackThis v2.0.2
Scan saved at 21:20:50, on 2008-07-03
Platform: Windows XP SP3 (WinNT 5.01.2600)
MSIE: Internet Explorer v7.00 (7.00.6000.20583)
Boot mode: Normal

Running processes:
C:\windows\System32\smss.exe
C:\windows\system32\winlogon.exe
C:\windows\system32\services.exe
C:\windows\system32\lsass.exe
C:\windows\system32\svchost.exe
C:\windows\System32\svchost.exe
C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
C:\Program Files\Alwil Software\Avast4\ashServ.exe
C:\windows\Explorer.EXE
C:\WINDOWS\system32\LEXBCES.EXE
C:\WINDOWS\system32\LEXPPS.EXE
C:\windows\system32\spoolsv.exe
C:\windows\system32\nvsvc32.exe
C:\windows\system32\svchost.exe
C:\Program Files\Webroot\Washer\WasherSvc.exe
C:\Program Files\WZCBDL Service\WZCBDLS.exe
C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
C:\Program Files\Unlocker\UnlockerAssistant.exe
C:\Program Files\Soft4Ever\looknstop\looknstop.exe
C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
C:\Program Files\Boingo\Boingo Wireless Software\Boingo.exe
C:\Program Files\D-Link\Air Utility\AirCFG.exe
C:\windows\system32\updater\explorer.exe
C:\windows\tsnpstd3.exe
C:\windows\vsnpstd3.exe
C:\windows\system32\ctfmon.exe
C:\Program Files\MétéoMédia\MétéoIMédia\WeatherEye.exe
C:\DOCUME~1\ADMINI~1\LOCALS~1\Temp\ir_ext_temp_1\autorun.exe
C:\Program Files\Makayama Interactive\Easy WiFi Radar\Easy WIFI Radar.exe
C:\Program Files\MétéoMédia\MétéoIMédia\WeatherEye.exe
C:\Program Files\Boingo\Boingo Wireless Software\WENGINE2\WMonitor.exe
C:\Program Files\Boingo\Boingo Wireless Software\WENGINE2\BWEngine.exe
C:\Program Files\Boingo\Boingo Wireless Software\WENGINE2\BWExtUserMode.exe
C:\PROGRA~1\MOZILL~1\FIREFOX.EXE
C:\Program Files\uTorrent\uTorrent.exe
C:\windows\Explorer.EXE
C:\----\PrcView.exe
C:\Program Files\MSN Messenger\msnmsgr.exe
C:\Program Files\MSN Messenger\usnsvc.exe
C:\Program Files\Internet Explorer\IEXPLORE.EXE
C:\Program Files\Trend Micro\HijackThis\HijackThis.exe
C:\Program Files\Media Player Classic\mplayerc.exe

R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Page_URL = https://www.msn.com/fr-fr/?ocid=iehp
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Default_Search_URL = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R1 - HKLM\Software\Microsoft\Internet Explorer\Main,Search Page = https://www.bing.com/?toHttps=1&redig=5FC791212101479BAFBE1A679848B1AF
R0 - HKLM\Software\Microsoft\Internet Explorer\Main,Start Page = https://www.msn.com/fr-fr/?ocid=iehp
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,SearchAssistant =
R0 - HKLM\Software\Microsoft\Internet Explorer\Search,CustomizeSearch =
R0 - HKCU\Software\Microsoft\Internet Explorer\Main,Local Page =
R1 - HKCU\Software\Microsoft\Internet Connection Wizard,ShellNext = http://runonce.msn.com/runonce3.aspx
R0 - HKCU\Software\Microsoft\Internet Explorer\Toolbar,LinksFolderName =
O2 - BHO: Aide pour le lien d'Adobe PDF Reader - {06849E9F-C8D7-4D59-B87D-784B7D6BE0B3} - C:\Program Files\Fichiers communs\Adobe\Acrobat\ActiveX\AcroIEHelper.dll
O2 - BHO: SSVHelper Class - {761497BB-D6F0-462C-B6EB-D4DAF1D92D43} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O2 - BHO: (no name) - {7E853D72-626A-48EC-A868-BA8D5E23E045} - (no file)
O4 - HKLM\..\Run: [NvCplDaemon] RUNDLL32.EXE C:\WINDOWS\system32\NvCpl.dll,NvStartup
O4 - HKLM\..\Run: [UnlockerAssistant] "C:\Program Files\Unlocker\UnlockerAssistant.exe"
O4 - HKLM\..\Run: [Look 'n' Stop] "C:\Program Files\Soft4Ever\looknstop\looknstop.exe" -auto
O4 - HKLM\..\Run: [D-Link AirPlus G] C:\Program Files\D-Link\AirPlus G\AirGCFG.exe
O4 - HKLM\..\Run: [ANIWZCS2Service] C:\Program Files\ANI\ANIWZCS2 Service\WZCSLDR2.exe
O4 - HKLM\..\Run: [avast!] C:\PROGRA~1\ALWILS~1\Avast4\ashDisp.exe
O4 - HKLM\..\Run: [Boingo Wireless Software] "C:\Program Files\Boingo\Boingo Wireless Software\Boingo.exe" -Minimized
O4 - HKLM\..\Run: [D-Link Air Utility] C:\Program Files\D-Link\Air Utility\AirCFG.exe
O4 - HKLM\..\Run: [Updater] C:\windows\system32\updater\explorer.exe
O4 - HKLM\..\Run: [tsnpstd3] C:\windows\tsnpstd3.exe
O4 - HKLM\..\Run: [snpstd3] C:\windows\vsnpstd3.exe
O4 - HKCU\..\Run: [CTFMON.EXE] C:\windows\system32\ctfmon.exe
O4 - HKCU\..\Run: [WeatherEye] C:\Program Files\MétéoMédia\MétéoIMédia\WeatherEye.exe
O4 - HKUS\S-1-5-19\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-19\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'SERVICE LOCAL')
O4 - HKUS\S-1-5-20\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-20\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'SERVICE RÉSEAU')
O4 - HKUS\S-1-5-18\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'SYSTEM')
O4 - HKUS\S-1-5-18\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'SYSTEM')
O4 - HKUS\.DEFAULT\..\Run: [CTFMON.EXE] C:\WINDOWS\system32\CTFMON.EXE (User 'Default user')
O4 - HKUS\.DEFAULT\..\RunOnce: [nltide_2] regsvr32 /s /n /i:U shell32 (User 'Default user')
O4 - Global Startup: Easy WiFi Radar (2).lnk = C:\Program Files\Makayama Interactive\Easy WiFi Radar\Easy WIFI Radar.exe
O8 - Extra context menu item: E&xporter vers Microsoft Excel - res://C:\PROGRA~1\MICROS~1\Office12\EXCEL.EXE/3000
O9 - Extra button: (no name) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra 'Tools' menuitem: Console Java (Sun) - {08B0E5C0-4FCB-11CF-AAA5-00401C608501} - C:\Program Files\Java\jre1.6.0_01\bin\ssv.dll
O9 - Extra button: Research - {92780B25-18CC-41C8-B9BE-3C9C571A8263} - C:\PROGRA~1\MICROS~1\Office12\REFIEBAR.DLL
O9 - Extra button: Lancer Voissa Anonymo - {C80DDAAA-310C-459B-9535-8370B4EBDA1F} - C:\Program Files\Voissa anonymo\Voissaanonymo.exe
O9 - Extra 'Tools' menuitem: Tools Menu Item - {C80DDAAA-310C-459B-9535-8370B4EBDA1F} - C:\Program Files\Voissa anonymo\Voissaanonymo.exe
O9 - Extra button: (no name) - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\windows\Network Diagnostic\xpnetdiag.exe
O9 - Extra 'Tools' menuitem: @xpsp3res.dll,-20001 - {e2e2dd38-d088-4134-82b7-f2ba38496583} - C:\windows\Network Diagnostic\xpnetdiag.exe
O9 - Extra button: Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O9 - Extra 'Tools' menuitem: Windows Messenger - {FB5F1910-F110-11d2-BB9E-00C04F795683} - C:\Program Files\Messenger\msmsgs.exe
O23 - Service: ANIWZCSd Service (ANIWZCSdService) - Alpha Networks Inc. - C:\Program Files\ANI\ANIWZCS2 Service\ANIWZCSdS.exe
O23 - Service: avast! iAVS4 Control Service (aswUpdSv) - ALWIL Software - C:\Program Files\Alwil Software\Avast4\aswUpdSv.exe
O23 - Service: avast! Antivirus - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashServ.exe
O23 - Service: avast! Mail Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashMaiSv.exe
O23 - Service: avast! Web Scanner - ALWIL Software - C:\Program Files\Alwil Software\Avast4\ashWebSv.exe
O23 - Service: Boingo Wireless Engine - Unknown owner - C:\Program Files\Boingo\Boingo Wireless Software\WENGINE2\BWEngine.exe
O23 - Service: Boingo WMonitor - Boingo Wireless, Inc. - C:\Program Files\Boingo\Boingo Wireless Software\WENGINE2\WMonitor.exe
O23 - Service: LexBce Server (LexBceS) - Lexmark International, Inc. - C:\WINDOWS\system32\LEXBCES.EXE
O23 - Service: NVIDIA Display Driver Service (NVSvc) - NVIDIA Corporation - C:\windows\system32\nvsvc32.exe
O23 - Service: Window Washer Engine (wwEngineSvc) - Webroot Software, Inc. - C:\Program Files\Webroot\Washer\WasherSvc.exe
O23 - Service: WZCBDL Service (WZCBDLService) - D-Link - C:\Program Files\WZCBDL Service\WZCBDLS.exe